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作 者:杨帆[1] 周学军 刘楠乔[1] 张煜[1] 吴国良[1] 程跃[1] 黄希文[1] 蔡亚非[1] 王根林[3]
机构地区:[1]安徽师范大学生命科学学院,芜湖241000 [2]南京奶业集团,江苏南京210095 [3]南京农业大学动物科技学院
出 处:《中国应用生理学杂志》2011年第3期333-337,共5页Chinese Journal of Applied Physiology
基 金:“十一五”国家科技技术支撑计划项目(2006BAD04A01,20064BAD04A12);芜湖市科技计划重点项目(2008620);安徽省自然科学基金项目(050410201)
摘 要:目的:为了研究中国荷斯坦奶牛的β-乳球蛋白(-βlactoglobulin,-βLG)基因外显子2多态现象对乳产量及成分影响。方法:本实验采用单链构象多态(PCR-SSCP)技术对中国荷斯坦奶牛-βLG基因(NCBI登录号:DQ489319)外显子2进行克隆及多态性研究。结果:8种SSCP带型:ab,abc,abcd,abd,abe,abcde,abce和abde型,带型频率分别为:0.14,0.10,0.27,0.23,0.05,0.04,0.11和0.06(P<0.05);6个单核苷酸位点:位点1 C>T,位点2 T>C,位点3 C>T,位点4 C>G,位点5 C>A,位点6 A>T或C,且它们的遗传多态信息含量处于中度或高度多态(PIC>0.25)。结论:中国荷斯坦奶牛-βLG基因外显子2区具有单核苷酸多态,单个核苷酸的改变影响奶牛的生产性能(牛乳产量、乳蛋白和脂肪含量等)。Objective: In order to study the effect of the polymorphism at the exon2 region of the β-LG allele gene on milk composition and yield. Methods: The single-strand conformation polymorphism method (PCR-SSCP) was used to analyze for polymorphism the exon2 region of the β-LG gene (NCBI accession number: DQ489319) in Chinese Holstein. Results: Eight SSCP patterns were detected in the fragments: ab, abc, abd, abe, abcd, abce, abde and abcde,and the patterns frequencies as follows: 0.14, 0.10, 0.27, 0.23, 0.05, 0.04, 0.11 and 0.06 ( P 〈0.05); Six single nucleotide polymorphism (SNP) were detected in this study: sitel C〉 T, site2 T〉 C, site3 C〉 T, site4 C〉 G, site5 C〉 A, site6 A〉 T or C, and the polymorphism information content (PIC) of these SNPs were in median or high polymorphism (PIC〉0.25). Condusion: These SNPs at the exon2 region of the β-LG gene were remarkably and affected milk performance traits (milk yield, protein and fat contents) in Chinese Holstein.
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